
Solution for assignment 11b: Motivation of generalized momentum
definition. \bigskip

$$ \frac{\partial\ }{\partial\dot{x}_i}\left(\frac{1}{2}\,m\,
   \vec{v}^2 - V(\vec{x})\right)\ =\ m\,\dot{x}_i\ =\ p_i\ . $$
\vfil 
